Color

#ecf74a

#ecf74a
hex#ecf74a
rgbrgb(236, 247, 74)
hslhsl(64, 92%, 63%)
oklchoklch(0.939 0.186 113.1)
Closest name: Buttercup Glow (#f1f458)Relative luminance 0.8485

Colors that go with #ecf74a

Plum, Charcoal and Crimson lead the list. Each partner is a real named colour with the reason it works — a wheel relationship, a neutral that carries it, or a pairing lifted from a palette or brand system that actually shipped — and every pair opens in the palette tool.

Tints & shades

Every swatch is its own page — click any to analyze it.

Harmonies

Complementary

Open in tool →

#554af7

#f7ac4a · #95f74a

#4aecf7 · #f74aec

Split-complementary

Open in tool →

#4a95f7 · #ac4af7

#4af7ac · #554af7 · #f74a95

Contrast

#ecf74a as textRatioAAAA largeAAAFix
Aaon white
1.17:1failfailfail
  • AA: use #737a05 as the text (4.65:1)
  • AAA: use #575d04 as the text (7.06:1)
  • AA: or shift the background to #6b6b6b (4.56:1)
  • AAA: or shift the background to #4f4f4f (7.01:1)
Aaon black
17.97:1passpasspassPasses AAA — no fix needed.

Fixes keep hue and saturation and move lightness only, so the suggestion stays on-brand. Ratios are symmetric: the same numbers apply with #ecf74a as the background.

Brands using this color

mcpConnect your agent — build around #ecf74a
live endpoint

Point any MCP client at the shared colors endpoint and your agent gets the same engine as this page — direct_palette, edit_direction, check_palette, check_contrast — read-only, no key. Every direction it proposes comes with a /colors/d/… link: open it, lock what you like, paste the link back, and the agent edits rather than re-rolls.

endpointhttps://mcp.brandsweets.com/colors/mcp
claude mcp add --transport http brandsweets-colors https://mcp.brandsweets.com/colors/mcp
try this prompt

analyze #ecf74a and generate a 5-color palette that keeps it as the primary; give me the /palettes/new link

tool url/palettes/new/ecf74a-b9bea2-4e8adf-262d1f-f1eee9?lock=0&style=vibrant

Want the agent to remember your picks and write them into a living brand? Create a free BrandSweets workspace.

Machine-readable: color.md